722.9 Conductor Plate Replacement Not Accepted
Thread Starter
Super Member
Joined: Jan 2007
Posts: 744
Likes: 73
From: PNW Wa State
R230, C5 Corvette Convertible, Audi Allroad, Lexus RX350, AE86 Hachi Roku
722.9 Conductor Plate Replacement Not Accepted
After calling 5 shops in my area I found a shop that does quality work.
The Shop Tech called me to ask some questions.
Turns out this particular car, an 04 wants not only the TCU replaced but the entire valve body. That's why I got locked out of the SDS SCN encoding process i had tried earlier. He showed me the screen. The car was requiring a valve body swap when changing the conductor plate.
So; my query is IF I can resolder the broken connections on my original board, Could you fool the main ECU into believing the replacement is the original? Or send the rebuilt virginized board back and buy a new MB blank with no guaranty it''ll still ask for a valve body. OR do I just just buy another valve body and just finish out coding of the replacement?
The tech was an MB rep and was going to put in a call to his old regional service rep he is friends with
This going to take some technical background searches.
Thanks for any replies
The Shop Tech called me to ask some questions.
Turns out this particular car, an 04 wants not only the TCU replaced but the entire valve body. That's why I got locked out of the SDS SCN encoding process i had tried earlier. He showed me the screen. The car was requiring a valve body swap when changing the conductor plate.
So; my query is IF I can resolder the broken connections on my original board, Could you fool the main ECU into believing the replacement is the original? Or send the rebuilt virginized board back and buy a new MB blank with no guaranty it''ll still ask for a valve body. OR do I just just buy another valve body and just finish out coding of the replacement?
The tech was an MB rep and was going to put in a call to his old regional service rep he is friends with
This going to take some technical background searches.
Thanks for any replies
MBWorld Fanatic!
Joined: Jun 2011
Posts: 1,494
Likes: 131
From: Cape town
not a merc
Xentry has no way of knowing its an old valve body. It checks the EHS number that u enter. Be more specific how its blocking u.. what car?
Fooling it is easy.. will the car drive properly is another issue
Fooling it is easy.. will the car drive properly is another issue
Thread Starter
Super Member
Joined: Jan 2007
Posts: 744
Likes: 73
From: PNW Wa State
R230, C5 Corvette Convertible, Audi Allroad, Lexus RX350, AE86 Hachi Roku
1. I bought a virginized plate because the original was way beyond repair
2.Company sold me the replacement NAG2 same as original
I think i know why the SDS system is asking for a plate/valve body. How would the TCU know the changed out valve body was a replacement or the original is my question? It has no electrical connection to the car, purely mechanical.
Knowing only small amount about programming it would make sense they built that 3 way junction at that point incase the SDS doesn't see error codes from the plate and/ or a later plate was tried.
So;
Plate is same Gen as original
Valve body was fine no issues
Original plate throwing constant Internal sensor/Turbine sensor error codes
New plate was stopped at C1519 / C15EF by SDS and aborted entire encoding
Shop erases all error codes and begins encoding only to be stopped at an SDS mandated decision junction
FWIW Neither chassis or trans codes on the car are listed in the onscreen replacement categories
2.Company sold me the replacement NAG2 same as original
I think i know why the SDS system is asking for a plate/valve body. How would the TCU know the changed out valve body was a replacement or the original is my question? It has no electrical connection to the car, purely mechanical.
Knowing only small amount about programming it would make sense they built that 3 way junction at that point incase the SDS doesn't see error codes from the plate and/ or a later plate was tried.
So;
Plate is same Gen as original
Valve body was fine no issues
Original plate throwing constant Internal sensor/Turbine sensor error codes
New plate was stopped at C1519 / C15EF by SDS and aborted entire encoding
Shop erases all error codes and begins encoding only to be stopped at an SDS mandated decision junction
FWIW Neither chassis or trans codes on the car are listed in the onscreen replacement categories
Last edited by Hary Gahtoe; Aug 1, 2017 at 01:05 AM.
MBWorld Fanatic!
Joined: Jun 2011
Posts: 1,494
Likes: 131
From: Cape town
not a merc
It doesn't know. But it needs to be compatible for the gearbox to function correctly.. Also you need to enter the EHS number (valve body) Before you flash the new control unit.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
Super Member
Joined: Jan 2007
Posts: 744
Likes: 73
From: PNW Wa State
R230, C5 Corvette Convertible, Audi Allroad, Lexus RX350, AE86 Hachi Roku
No. I resoldered the original plate and gave it to the service tech today hoping he could pull all the hard info off my plate.
Update:
I got a call from the tech and we reached a solution.
The MB regional Tech Supervisor confirmed the screen cap. It takes a Blank MB plate specifically for my VIN not just a virginized rebuilt even of the same generation
Thanks
Hary
Update:
I got a call from the tech and we reached a solution.
The MB regional Tech Supervisor confirmed the screen cap. It takes a Blank MB plate specifically for my VIN not just a virginized rebuilt even of the same generation
Thanks
Hary
Last edited by Hary Gahtoe; Aug 3, 2017 at 12:45 AM.
MBWorld Fanatic!
Joined: Jun 2011
Posts: 1,494
Likes: 131
From: Cape town
not a merc
Do you have comms with the original unit?
Then it's easy to read the scn and variant string!
If your rebuilt unit is of the same part number as the original
Then you can flash it and use the same scn coding. If not then buy a new valve body!
Then it's easy to read the scn and variant string!
If your rebuilt unit is of the same part number as the original
Then you can flash it and use the same scn coding. If not then buy a new valve body!
Thread Starter
Super Member
Joined: Jan 2007
Posts: 744
Likes: 73
From: PNW Wa State
R230, C5 Corvette Convertible, Audi Allroad, Lexus RX350, AE86 Hachi Roku
If you'd read my posts before you reply You'd realize your posts aren't relative in my particular situation.
Situation has been remedied but thanks anyways
Situation has been remedied but thanks anyways
Last edited by Hary Gahtoe; Aug 3, 2017 at 12:48 AM.
